EP 1702101 B1 20090225 - BATCH PROCESS FOR PREPARING PULP
Title (en)
BATCH PROCESS FOR PREPARING PULP
Title (de)
DISKONTINUIERLICHES VERFAHREN ZUR HERSTELLUNG VON ZELLSTOFF
Title (fr)
PROCEDE DISCONTINU DE PREPARATION DE PATE
Publication
Application
Priority
- FI 2004050196 W 20041222
- FI 20031929 A 20031231
Abstract (en)
[origin: WO2005064075A1] According to the invention, polysulfide is used in the manufacture of kraft pulp in the initial stage of a displacement batch process in order to improve the yield. Polysulfide-containing white liquor is added intermixed with the first liquor charged to the digester, or as a separate charge before the impregnation liquor is introduced. Preferably, a cooking catalyst, e.g. antraquinone, is added to the white liquor charge as the cooking stage commences.
IPC 8 full level
D21C 1/06 (2006.01); D21C 3/02 (2006.01); D21C 3/22 (2006.01); D21C 3/26 (2006.01); D21C 11/00 (2006.01)
CPC (source: EP US)
D21C 1/06 (2013.01 - EP US); D21C 3/02 (2013.01 - EP US); D21C 3/222 (2013.01 - EP US); D21C 3/26 (2013.01 - EP US); D21C 11/0021 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005064075 A1 20050714; AT E423866 T1 20090315; CA 2530704 A1 20050714; DE 602004019689 D1 20090409; EP 1702101 A1 20060920; EP 1702101 B1 20090225; FI 120361 B 20090930; FI 20031929 A0 20031231; FI 20031929 A 20050701; US 2006175029 A1 20060810
DOCDB simple family (application)
FI 2004050196 W 20041222; AT 04805227 T 20041222; CA 2530704 A 20041222; DE 602004019689 T 20041222; EP 04805227 A 20041222; FI 20031929 A 20031231; US 56437304 A 20041222